Whats going on?!?

Well he doesn't want anyone seeing him weak infront of anyone when you guys are fighting. He only says sorry and acts all nice after a fight with you when you guys are alone. He is just ashamed to be seen that way infront of people. So talk to him and if he says he doesn't know what your talking about tell him that you don't want to be with him when he's ashamed to show his devotion to you and dump him.